52651640 has 32 divisors (see below), whose sum is σ = 122290560. Its totient is φ = 20380800.

The previous prime is 52651607. The next prime is 52651663. The reversal of 52651640 is 4615625.

52651640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19991 + ... + 22470.

It is an arithmetic number, because the mean of its divisors is an integer number (3821580).

Almost surely, 2^52651640 is an apocalyptic number.

It is an amenable number.

52651640 is an abundant number, since it is smaller than the sum of its proper divisors (69638920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52651640 is a wasteful number, since it uses less digits than its factorization.

52651640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42503 (or 42499 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 52651640 is about 7256.1449820135. The cubic root of 52651640 is about 374.8037847575.

The spelling of 52651640 in words is "fifty-two million, six hundred fifty-one thousand, six hundred forty".